/* 全局重置与黑白风格 */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    background-color: #050505;
    color: #f0f0f0;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Three.js 画布固定在背景 */
#webgl-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.6;
}

/* 内容容器 */
.content-wrapper {
    position: relative;
    z-index: 1;
    min-height: 200vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 20px;
}

/* 首屏排版 */
.hero-section {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

h1 {
    font-size: clamp(3rem, 6vw, 6rem);
    letter-spacing: 0.6em;
    font-weight: 200;
    margin-bottom: 1.5rem;
}

.sub-title {
    font-size: clamp(1.1rem, 2.5vw, 1.6rem);
    letter-spacing: 0.3em;
    color: #aaaaaa;
    font-weight: 300;
}

/* 中段留白区 */
.scroll-section {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 600px;
}

.text-block h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.15em;
}

.text-block p {
    font-size: 1.25rem;
    color: #cccccc;
    line-height: 2;
}

/* 底部按钮区 */
.action-section {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
}

.blog-btn {
    padding: 20px 55px;
    border: 1px solid #ffffff;
    color: #ffffff;
    text-decoration: none;
    font-size: 1.2rem;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    transition: all 0.4s ease;
    background: transparent;
}

.blog-btn:hover {
    background-color: #ffffff;
    color: #000000;
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.3);
}

.footer-text {
    font-size: 0.9rem;
    color: #666666;
    letter-spacing: 0.1em;
    margin-top: 3rem;
}

/* 简单的滚动淡入动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s ease, transform 1s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.3s; }